The Megaflo Eco SystemFit 170SF is a 170-litre indirect unvented hot water cylinder designed for installation with a heat-only (regular) boiler. It builds on the standard Megaflo Eco design by incorporating factory-fitted plumbing and wiring, helping reduce installation time and providing a consistently neat installation.
The factory-fitted system includes a 3kW Superloy 825 immersion heater, three 22mm 2-port motorised valves, Grundfos UPM3 Auto L 25-70 primary circulation pump, wiring centre, balancing valve and automatic differential bypass valve. An internal floating baffle expansion vessel is built into the cylinder shell, eliminating the need for a separate DHW expansion vessel.
170 Litre Capacity
Indirect Unvented
Factory-Fitted System
ErP B Rated
Max Flow
76 L/min @ 3 bar
Standing Heat Loss
1.20 kWh/24h
Applications & suitability
Heat-Only Boiler Systems
Designed specifically for installation with a compatible heat-only (regular) boiler in an indirect unvented hot water system.
Residential Hot Water
The 170-litre capacity provides stored hot water for residential applications requiring mains-pressure hot water storage.
Neat System Installation
Factory-fitted plumbing and wiring provide an integrated installation arrangement with key system components already fitted.
Multiple Heating Zones
Three pre-fitted and wired 22mm 2-port motorised valves are provided for CH zone 1, CH zone 2 and DHW.
Key specifications
| Product Name |
Megaflo Eco SystemFit 170SF |
| Product Code |
95050452 |
| Type |
Indirect Unvented Hot Water Cylinder |
| Boiler Type |
Heat-Only (Regular) Boiler |
| Nominal Capacity |
170 Litres |
| Height |
1384 mm |
| Width |
630 mm |
| Depth |
720 mm |
| Weight Empty / Full |
52 kg / 234 kg |
| Standing Heat Loss |
1.20 kWh/24h |
| Maximum Flow at 3 bar |
76 L/min |
| Maximum Flow at 1 bar |
45 L/min |
| Heat-Up Time |
22 min at 15 L/min, 80°C primary, 15°C–60°C |
| Recovery 70% Draw-Off |
16 min |
| Backup Immersion |
1 × 3 kW @ 240 V |
| Operating Pressure |
3 bar (0.3 MPa) |
| Maximum Mains Pressure |
16 bar (1.6 MPa) |
| Minimum Recommended Supply Pressure |
1.5 bar / 20 L/min |
| Inner Vessel |
High Grade Duplex Stainless Steel |
| Insulation |
60 mm CFC/HCFC-Free Polyurethane Foam |
| ErP Rating |
B |
Installation & compatibility
The Megaflo Eco SystemFit 170SF is designed for indirect connection to a heat-only (regular) boiler. Factory-fitted components include the Grundfos UPM3 Auto L 25-70 primary circulation pump, three 22mm 2-port motorised valves, lock shield flow balancing valve, automatic differential bypass valve and wiring centre. The internal floating baffle expansion vessel is built into the cylinder shell, so no separate DHW expansion vessel is required.
Design & performance benefits
Factory-Fitted Plumbing & Wiring
Factory-fitted plumbing and wiring provide a consistently integrated system arrangement and help reduce installation work.
Duplex Stainless Steel
The inner vessel is manufactured from high-grade duplex stainless steel for the specified cylinder construction.
60 mm PU Insulation
60mm CFC/HCFC-free polyurethane foam insulation supports the cylinder's specified standing heat loss of 1.20 kWh/24h.
High Flow Capability
The cylinder is specified for maximum flow rates of 76 L/min at 3 bar and 45 L/min at 1 bar.
Additional installation features
3 × Motorised Valves
Three pre-fitted and wired 22mm 2-port valves are provided for CH zone 1, CH zone 2 and DHW.
Integrated Expansion Vessel
An internal floating baffle expansion vessel is built into the cylinder shell, avoiding the need for a separate DHW expansion vessel.
Cold Water Inlet Control Kit
Supplied with a 3 bar pressure reducing valve incorporating a strainer and check valve, specified to BS EN 1567, BS EN 1491 and EN 13959.
Ideal for
Regular Boiler Systems
Designed for indirect hot water systems using a compatible heat-only (regular) boiler.
170 Litre Hot Water Storage
Suitable for installations requiring 170 litres of nominal unvented hot water storage.
Multi-Zone Heating Systems
The factory-fitted valve arrangement supports CH zone 1, CH zone 2 and DHW connections.
Neat Integrated Installations
A suitable choice where factory-fitted plumbing, wiring, pump and system components are preferred for an integrated installation.
The Megaflo Eco SystemFit 170SF combines 170 litres of indirect unvented hot water storage with factory-fitted plumbing, wiring, pump, motorised valves and system controls. With 76 L/min maximum flow at 3 bar, 22-minute heat-up time, 1.20 kWh/24h standing heat loss, 60mm polyurethane insulation and ErP B rating, it provides an integrated cylinder solution for compatible heat-only boiler systems.
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